linux deduplication

Function descriptionData deduplication refers to finding and deleting duplicates in the data without affecting their fidelity or integrity. The goal is to change (32-128 KB) small chunks by splitting the files into sizes, identify duplicate chunks, and then keep a copy of each chunk to store more data in a smaller space. A redundant copy of a chunk is replaced by a reference to a single copy. Chunks are compressed and then organized into the System Vo

This article summarizes four methods of array deduplication in javascript, which are loop matching deduplication, JSON deduplication object deduplication dictionary deduplication, and queue recursive deduplication, the INDEXOF

1. What is deduplication?Simply put, when data is transmitted or stored over the network, multiple identical copies are not transmitted or stored.Data to reduce the occupation of network bandwidth and storage space. In fact, the previous SIS (single-instance storage) is a dedu technology, but its de-duplication unit is file. Currently popularThe deduplication technology is based on data blocks. The de-dupli

Storage has been a major drag to reduce operating costs, although the cost of storage has been decreasing in recent years, but the growth rate of enterprise data is far more than the reduction of storage costs, so how to reduce the pressure on the storage to the enterprise is a big test for IT staffMicrosoft has brought a surprising feature in Windows Server 2012, called Deduplication, which allows Windows Server 2012 to store more data in less physic

When deduplication is, temporary processing is disabled, and 80 Original Works are from the blog of "Deep Blue blog". You are welcome to repost them. Please indicate the source when you repost them. Otherwise, the copyright will be held legally responsible. Deep Blue blog: http://blog.csdn.net/huangyanlong/article/details/46041735 Temporary handling of 80 million data deduplication Recently, When I dedupli

Array deduplication of JavaScript learning notes, javascript learning notes Recommended reading:Add, delete, modify, and query the array of JavaScript learning notes Array Summation Method for JavaScript learning notes Random sorting of JavaScript learning notes Array In other words, the interviewer often asks the JavaScript array de-duplication question. Recently, I just learned about the JavaScript array and took the opportunity to sort out some met

For SQL deduplication, I would like to briefly introduce myself. If you have any suggestions or do not understand it, please give it a little more. There are two common ways to remove SQL deduplication: DISTINCT and ROW_NUMBER (). Of course, ROW_NUMBER () has many important functions besides deduplication, I will give you a brief description of what I actually us

ZBackup: A Multi-Function deduplication Backup Tool Zbackup is a global deduplication Data Backup Tool Based on rsync. After passing in a large tar file, it will store the duplicate part of the file only once, compress the results, and determine whether to encrypt the file based on the parameters. After passing in another tar file, it will reuse duplicate data from the previous backup file. Only new changes

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Javascript implements multiple methods for Array deduplication, and javascript implements arrays. Don't talk nonsense, just pick up the dry goods! Let's talk about the requirements of this instance: Write a method to implement de-duplication of arrays. (Requirement: Execute the method, pass an array, and return the new array after deduplication. The original array remains unchanged. During implementation, o

Capacity optimization. Data deduplication in Windows Server 2012 can store more data in a smaller physical space. It achieves higher storage efficiency than previous versions that use single Instance storage (SIS) or new technology file system (NTFS) compression. Data Deduplication uses sub-file variable-size chunking and compression, and the optimization rate for regular file servers is 2:1, while virtual

Deduplication has been widely used in data backup. We found that for backup applications, we can delete and compress data by repeat data about 20 times, thus saving a lot of storage space. How can I retrieve duplicate data blocks? If byte-level comparison is adopted, the performance of the entire system is certainly unacceptable. To solve this problem, you can use the data fingerprint technology to retrieve duplicate data blocks. The principle of this

What should you do if the recovery data grows too large and traditional disaster recovery methods cannot achieve the goal? Some new technologies, such as deduplication, storage Tiering, and data management policies, can help you reduce the high cost of disaster recovery, at the same time, it can also achieve the expected recovery time objective (rediscovery time objective or RTO ). In the previous article, we gave an example of a company ignoring the

This article mainly introduces python's implementation of text deduplication without disrupting the original sequence. For more information about python's implementation of text deduplication without disrupting the original sequence, see the next article, for more information, see The code is also found on the Internet, which is very efficient and especially suitable for

VNX data block deduplication can be enabled on each Pool.1. To enable deduplication for a traditional RAID group LUN, you must first migrate it to the storage pool ).2. Once deduplication is enabled, the LUN will be migrated to the deduplication container. After the migration is complete, the LUN will become Thin LUN.T

PHP two-dimensional array deduplication method (retain each key value while removing repeated items)-uniqueness of the two-dimensional array. PHP two-dimensional array deduplication method (retain each key value while removing repeated items) -- The uniqueness of the two-dimensional array requires deduplication for the following two-dimensional array: $ arrarray

I found that the prefixes of several blogs are "not simple", which roughly describes the status of a seemingly simple task. It is not easy to find out after practice. A lot of things are like this. If you do not do it yourself, if you do not study it carefully, you can only be in a confused state.This reminds me of another story. When I graduated, I was interviewed by a CTO from a company. He told me a word that makes me still remember it, he told me that technology is actually very simple (a Da

Tags: tar where table insert into strong creat sele Tinfirst, the total data deduplication methodThe idea is to first create a temporary table, and then insert the table data after distinct into the temporary table, then empty the original table data, and then the temporary table data inserted into the original table, and finally delete the temporary table.The following SQL statements can be used for full deduplic